This work is licensed under a
Creative Commons Attribution 4.0 International License
 Mendez C. B., Klenzendorf J. B., Afshar B. R., Simmons M. T., M. E. Barrett, Kinney K., Kirisits. M. J. (2011) The effect of roofing material on the quality of harvested Rainwater water r e s e arch 45, p.2049 - (2059).
 Gregoire B. G., Clausen J. C. (2011) Effect of a modular extensive green roof on stormwater runoff and water quality Ecological Engineering 37, p.963–969l.
 Burton G.A., Jr. I and Pitt, R. (2002) Storm water effects handbook; A tool box for watershed managers, scientists and engineers, CRC, BOCA Raton, Fla.
 Clark S.E. Wre P.E. D, Asce M., Steele K.A., Asce A.M., Spicher J. Siu C.Y. S, Lalor M.M., Pitt R. and Kirby J.T. (2008) Roofing materials contribution to storm-water runoff pollution. Journal of Irrigation and drainage Engineering Vol. 134 No. 5.
 Polkowska Z. and Namiesnik J. (2008) Road and roof runoff waters as a source of pollution in a big urban agglomeration (Gidansk, Poland). Ecol. Chem and Eng., 15(3) pp.375-385.
 Ayenimo, J. G, Adekunle, A. S, Makinde, W.O. and Ogunlusi, G.O. (2006) Heavy metal fractionation in Roof runoff in Ile-Ife, Nigeria, Internat. J. Environ. Sci. and Tech., 3(3) pp.221-227.
 Lamprea K and Ruban V. (2008) Micro pollutants in atmospheric deposition, roof runoff and storm water runoff of a suburban catchment in Nantes, France. 11th International conference on Urban Draiange, Ediburgh, Scotlant, (2008).
 Bannerman, R.T., Owens, D.W., Dodds, R.B., Hornewer, N.J., 1993. Sources of pollutants in Wisconsin stormwater. Water Sci. Technol. 28, 241–259.
 Egodawatta, P., Thomas, E., Goonetilleke, A., 2009. Understanding the physical Processes of pollutant build-up and wash-off on roof surfaces. Sci. Total Environ. 407, 1834–1841.
 Förster, J., 1996. Patterns in roof runoff contamination and their implications on practice and regulation of treatment and local infiltration. Water Sci. Technol. 33, 39–48.
 Van Metre P.C. and Mahler B.J. (2003) The contribution of particles washed from rooftops to contaminate loading to urban streams, chemosphere 52(10) pp.1727-1741.
 Boulanger, B., Nikolaidis, N.P., 2003. Mobility and aquatic toxicity of copper in an urban watershed. J. Am. Water Resour. Assoc. 39, 325–326.
 Njoku P.C. and Ibe F.C. (2009) Heavy metal accumulation in electronic technician in Owerri JCSN, Vol. 34 91) Pp. 1-4.
 Tobiszewski M., Polkowska Z., Konieczka P. and Manuenik J. (2010) Roofing materials as pollution eemitters concentration changes during runoff polish J. of Environ. Stud. Vol. 19 No. 5 pp.1019-1028.
 Forster J. (1999) variability of roof runoff quality. Wat Sci Tech. 35 (5) Pp. 137-144.
 Chang M., McBroom M. W and Beasley R. S (2004) Roofing as a source of non point water pollution, J. Environ. Man. 73 (4) Pp. 307-315.
 Gromaire -Mertz M.C., Garnaud S., Saad M. and Chebbo G. (2001) Contribution of different sources to the pollution of wet weather flow in combined sewers. Wat. Res., 35(2) Pp 521-533.
 Van Metre P.C. and Mahler B.J. (2003) The contribution of particles washed from Roof tops to contaminate loading to urban streams, chemosphere, 52(10) pp.1727-1741.
 Nichelson N., Clark S.K., Long B. V Spicher J. and Steele K.A. (2009).
 Mendez B.C., Afshar B.R., Kinney K., Barrett M. E and Kirisits M.J. (2010).
 Olaoye R. A and Olaniyan, O. S (2012) Quality of rainwater from different roof material. internet. J . of Eng. And Tech Vol. 2 (8) Pp. 1413-1421.
 Despin C., Farahbakhsh, K. and Leidl C. (2009) Assessment of rainwater quality from rainwater harvesting systems in Ontario, Canada, Journal of water supply: Research and Technology-Aqua 58 (2) Pp. 117-134.
 Efe S.I. (2006). Quality of rainwater harvesting for rural communities of Delta State Nigeria. The Environment 26(3): Pp. 175-181.
 Egereonu U. U (2005) A study of the ground water pollution by nitrate in the environment, Aba, Nigeria, JCSN 30 (2), Pp. 211-218.
 Akintola O. A, Sangodoyin AY and Agumbiade F.O. (2013) Evaluation of environmental pollution effects on domestic roof-harvested rainwater in southern part of Nigeria using impact indices. Water practice and Technology 8(2) Pp 245-255.
 Allen S. E, Grimshaw H. M, Parkinson J. A and Quamby C. (1974) Chemical analysis of ecological materials, Blackwell scientific publications, Oxford, London, p.103, 104.
 Egereonu U.U. and Ozuzu C.I.U. Physiochemical analysis of the River Niger at Onitsha Bank, Nigeria (2005) J. Chem. Soc. Nigeria 30 (2) p.197 – 203.
 Ibe F.C., Chinedu N. B. and Ikpa C.B. C (2014) Physiochemical analysis of some surface and ground water sources in Etim Ekpo, LGA, Akwa Ibom State, Nigeria. Journal of Applied Sciences AS 17(2) p.11250 – 11260.
 Njoku V.O., Obi C. and Obodo G. A (2007) Heavy metals concentrations in some surface and ground waters in Imo State, Int. J. of Natural and Applied Sci. 3(2), pp.157-159.
 Zhang W., Li S., and Tang F., (2013).
 Simmons G., Hope V., Lewis G., Whitmore J., and Wanzhen G., (2001) Contamination of potable roof-collected rainwater in Auckland, New Zealand. Water Res. 35, 2001, p.1518–1524.
 Adedeji O.H. and Olayinka O. O (2014) Micro-pollutants in urban residential roof runoff. Environmental and health implication 10SR-JESTFT 8(2) version (III) Pp. 55-63.
 Lee J.Y., Yang J.S., Han M., Choi J., (2010) Comparison of the microbiological and chemical characterization of harvested rainwater and reservoir water as alternative water resources. Science of the Total Environment 408 (4), pp.896-905.
 Yaziz, M.I., Gunting, H., Sapari, N., Ghazali, A.W., 1989. Variations in rainwater quality from roof catchments. Water Research 23(6), pp.761-765.
 Lee J.Y., Bak G., Han M. (2012) Quality of roof-harvested rainwater-comparison of different roofing materials. Environ. Pollut. 162, 422-429.
 Singh, T., Kalra, Y.P., (1975). Specific conductance method for in situ estimation of total dissolved solids. Journal of American Water Works Association 67 (2), pp.99-100.
 Quek U. and Forster J. (1993) Trace metals in roof runoff. Water, Air and Soil pollution 68, 373-389.
 Berndtsson J. C, Bengtson L. and Jinno K (2009) Runoff water quality from intensive and extensive vegetated roofs. Ecol. Eng., 35, Pp 369-380.
 WHO (2003) WHO Guildelines for drinking water quality, Geneva. http: /www. who. int/water_health/dwq/guideline/en/ (accessed 5, May 2014).
 Gromaire-Mertz M.C., Garnauds, Gionzalez A. and Chebbo G. (1999). Characterization of Urban runoff pollution in Paris. Wat. Sci. Tech., 39(2) Pp. 1-8.
 Uzoma V. C Alsangodoyin A.Y. (2000) Rainwater chemistry as Influenced by atmospheric deposition of pollutants in southern Nigeria. Environ. Manage Health, 11 (2), 149-156.
 Dannecker W., AUM and Stedimann, H (1990) Substances load in rainwater runoff from different streets in Hamburg. Sci. Tet. Environ, 93, Pp. 385-392.
 Alloway B.J. and Ayres D.C. (1997) Chemical Principles of Environmental Pollution, 2nd Ed., Blackie Academic and Professional. Pp. 196.
 Han F.X., Banin A., Triplett G.B., (2001) Redistribution of heavy metals in arid-Ozone soil under a wetting-drying cycle soil moisture regime. Soil Sci. 166, pp.18-28.
 Madrid F and Florido M.C. (2010) Effects of the presence of composted biosolids on the metal immobilizing action in an urban soil. J. Hazard, Mater. 176, Pp. 792-798.
 Y. Yang, G. Toor, "Sources and mechanisms of nitrate and orthophosphate transport in urban stormwater runoff from residential catchments", Water Research, Vol. 112, p. 176, 2017DOI: https://doi.org/10.1016/j.watres.2017.01.039
 I. Francis Ch, O. Alexander , N. Pascal Chu, A. Jude Ikech, "Ambient Air Quality Assessment of Orlu, Southeastern, Nigeria", Journal of Applied Sciences, Vol. 17, p. 441, 2017DOI: https://doi.org/10.3923/jas.2017.441.457
 F. Ibe, A. Opara, B. Ibe, B. Adindu, B. Ichu, "Environmental and health implications of trace metal concentrations in street dusts around some electronic repair workshops in Owerri, Southeastern Nigeria", Environmental Monitoring and Assessment, Vol. 190, 2018DOI: https://doi.org/10.1007/s10661-018-7023-6
 娜. 李, "Research Progress on Foreign Non-Point Source Pollution Based on Scientific Measurement Analysis", Water pollution and treatment, Vol. 07, p. 1, 2019DOI: https://doi.org/10.12677/WPT.2019.71001
 P. Njoku, F. Ibe, J. Alinnor, A. Opara, "Seasonal Variability of Carbon Monoxide (CO) in the Ambient Environment of IMO State, Nigeria", International Letters of Natural Sciences, Vol. 53, p. 40, 2016DOI: https://doi.org/10.18052/www.scipress.com/ILNS.53.40